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ENERGY ANALYSIS AND MODELING OF MEMBRANE REACTORSPROMECA Workshop 2017
ENERGY ANALYSIS AND MODELING OF MEMBRANE REACTORS
PROMECA Workshop 2017
Consortium Partners
Applied Research & Development Group Leader
Emma Palo
KT – Kinetics Technology PILOT MEMBRANE REFORMER
1. Introduction
2. Pilot plant description
3. Main results
4. Acknowledgments
AGENDA
02
INTRODUCTION
03
Methane steam reforming is currently the primary hydrogen production route on industrial scale due to its reliability and its economic benefit over other processes.This process is highly endothermic and equilibrium limited. To achieve a high conversion of methane, it has to be carried out at high temperature, leading to high energy consumption.
CH4 + H2O ↔ CO + 3H2Steam reforming reaction, strongly endothermic
∆H°25°C= 206 kJ/mol
CO + H2O ↔ CO2 + H2Water gas shift reaction, mildly esothermic
∆H°25°C= -41 kJ/mol
Removing hydrogen from the reaction zone allows to shift chemical equilibrium towards products enhancing hydrogen yield at lower temperature
• USE OF LOW GRADE HEAT REJECTED BY A BOTTOM PROCESS• USE OF LOWER EXPENSIVE MATERIAL FOR REFORMING TUBE
INTRODUCTION
04
Pd-based supported membranes seem to be the most promising membrane typology, thanks tothe high selectivity and good permeation flux. They can be integrated in steam reformingprocess in two configurations:
directly inside the reaction environment, so that the hydrogen produced by the reactions isimmediately removed (CLOSED OR INTEGRATED ARCHITECTURE);assembled in separation modules applied downstream to reaction units (OPENARCHITECTURE)
KT PILOT MEMBRANE REFORMER has been realized in OPEN ARCHITECTURE with TWO stages of REACTIONS and TWO stages of MEMBRANE SEPARATION
PILOT PLANT DESCRIPTION
05
Desulphurizer
R‐01
H2 + (sweep steam)
Demi water
Natural gas
M‐01A/B
R‐02
M‐02
Hot oil boiler water
Flare
FIC
stack
TIC
TIC
M M
MFIC
M M
M
PIC
c.c.Flue gas Flue gas
c.c. AirAir
PIC
Compressed dry air package
Cooling water package
Demi water package
UTILITIES
Hot oil boiler
Gas chromatographer
ABB analyser
ANALYSIS INSTRUMENTS
PILOT PLANT DESCRIPTION
06
TECHNOLOGICAL AND SCIENTIFIC PARK OF ABRUZZO
PLANT CAPACITY = 20Nm3/h PURE HYDROGEN
PILOT PLANT DESCRIPTION
07
TECHNOLOGICAL AND SCIENTIFIC PARK OF ABRUZZO
PLANT CAPACITY = 20Nm3/h PURE HYDROGEN
PILOT PLANT DESCRIPTION
08
TECHNOLOGICAL AND SCIENTIFIC PARK OF ABRUZZO
PLANT CAPACITY = 20Nm3/h PURE HYDROGEN
Shape: TUBULARSubstrate: ALLUMINASurface: 0.4m2
Material:PdThickness: 2.5μm
Shape: FLATSubstrate: SSSurface: 0.6m2Material: Pd-AgThickness: 25μm
Shape: TUBULARSubstrate: ALLUMINASurface: 0.13m2Material: Pd-AgThickness: 2.5μm
PILOT PLANT DESCRIPTION
09
Support SILICON CARBIDE
CatalystNOBLE METALS (Pt, Rh)
15 cm
6 cm
• LOWER PRESSURE DROP• HIGHER HEAT TRANSFER• HIGHER MATERIAL TRANSFER
MAIN RESULTS
010
40%
45%
50%
55%
60%
65%
70%
590 600 610 620 630 640 650
Methane
conversion
, %
Reformer temperature, °C
RMM based on ECN membrane
RMM based on MRT membrane
without membrane
The OPEN architecture performed a methaneconversion up to 10-12% higher than equilibriumvalues.
An overall feed conversion of 57.3% wasachieved at 610°C, about 26% higherthan what can be achieved in aconventional reformer at the sametemperature
Feed Pressure: 10bargSteam to carbon ratio: 4.8Membrane Temperature: 400-450°C
Plant stable operation up to 3000 hours40%
50%
60%
70%
80%
90%
100%
1 2 3 4 5 6
Metha
ne con
version, %
Number of reformer stage, ‐
Tref=600°C; A=0,4
Tref=650°C; A=0,4
Exp. value
ACKNOWLEDGMENTS
011
PROMECA PROJECTMarie Skłodowska-Curie RISE action, Grant Agreement number 734561
is gratefully acknowledged for the financial support
Consortium Partners
Thank you for your attention
FOR MORE INFORMATION: Emma Palo- Applied Research & Development Group Leader – [email protected]